Adjustments for chiropractic tables



I w. E. RICE.

ADJUSTMENTS FOR CHIROPRACTIC TABLES. APPLICATION FILED JULY 2, I919. RENEWED JUNE 25, 1920.

1,360,580. Patenwd Nov. 30, 1920.

i o o WERice O 5 wIIinrA'M; 1 any oFYBo LIv,AR ,i 1vrrssoUR imam/mats ren 'oiiiitornnorro TA LE A plicationiiieti'nil 'zj 1913, ser al no. scenes. r newedqanei25,-1e2oi ser1a1no.'391,a38.

1 Be it known that I, WVILLIAM 'E- I C l citizen of the United States; residing at Bolivar, inthe county of Polk and the State of fU-shaped bar 7 carries'transverse bolts, 8 and Missouri, have invented certain new and useful improvements in Adjustments forfChi-f ropractic Tables, which the following is a specification. 9 This invention relates to means for adj usting the tension 01"? a lifting or supporting spring for tables of the type mentioned, being an improvement on the form of adjustmentshown inmy application filed Novemher 2, 1917, SerialjNo. 199,908, the device as herein shown and described"automatically adjusting the spring tension-to the weightof the patient standing on'the foot rest.

The invention consists of the novelfea tures 01": construction hereinafter described, pointed out in the claims and shown inthe accompanying drawings, in which Figure 1. is a sideelevation parts being shown in section. v j

Fig. 2 is a front end elevatioin the table being broken ofl". i

' Fig. 3 is a plan View of a U-bar. I In these drawings 1 designates thesupport for thetable, usually referredto asthe stand and 2 the side arms of" the-table, only the foot portions being shown. A slightly curved castingS is pivotally mount ed midway its ends within the stand 1, the casting being longitudinally slotted and its forward ends being formed with notches A bar 5 connects the arms 2 and end portions of lifting springs 6 engage said bar, saidspringsbeing coiled about a bar 6 which also forms a pivot for the arms 52.- .A

9 adjacent its ends, and the bolt 9 is e11- gaged by the remaining end portions of the springs 6. A comparatwely weak sprlng 10 is fixed to a suitable base at the lower end and its upper end is the bar 7.

The bolt 8 works in the slot of the curved casting 3 and is adapted to engage the adjustably connected to notches 4, thereby locking the bar 7 in position along said slot. An angled plate ll is secured across the arms 2, and between said plate and the arm ends is placed a shdable plate 12 carrying a foot rest 13. This foot rest and its plate 12 is supported by rods 14 which work through the angled plate 11 and springs 15 coiled about the rods 14 and! which bear at their lower ends on the plate ersplaced on the rods. fis fixedtotlie front of v jectsrearwardly ever the upper edge ofit,'

and engagesthe bow portion of the bar 7- when'the armsQ are in vertical position, as' a with a suitable 'headcarri'ediby the ro s, and

which maybe inthe form of nntsand wash- An angled-strap 16 shown in; Fig. 1. V v

Brackets 17 are secured to the arms adjapivotally'connected bars 1 8which are also pivotally connected to opposite. sides ofthe lower portion'ofthe casting 3. As the table swings into horizontal positionthese bars 181 draw the lower end of the casting 3 upwardlvand forwardly; y i A set screw19 works through the vertical 1 portion of the plate 11, when the arms are in upright position, and bearson the lower end I I Sp ecifi cati on of Letters Patent. Patented 1920- i v 11 and have their upperends in enga ement the plate-12 and pro-i cent'the plate 11 and to said brackets are Y of the springs 6, limiting their forward "movement. y y I The operation of the parts above described I ,isas follows q 5 r 1 When thedevice is assembled the screw 19 is adjusted so thatbtheiarms '2, are inupright position the lower ends of the spring 6 will be stopped or held in such position that theboltS ofthe-bar-7will work readily along the'slotted casting 3 without-engaging the notches, leaving'it free movement the length of. the slot. This adjusting screw need not be touched in future use of the table, unless to compensate for. some'slight wear.

VVhen'the parts arein the position shownin Fig. 1, with step or foot rest 13 in highest position and the casting 3 in approximately a vertical position, the bolt 8 will be free to travel along the casting. If a' child of fifty'pounds weight is placed on the foot restthe plate 12 will move downwardly until the springs 15 will'support such weight.

The angled strap 16 will depress the bowportion of the bar 7. which works on the bolt 9 as a pivot, and the bolto8 will travel up the slot otthe casting oppositea partic ular notch 4. It now the arms-are drawn down in a horizontal position to rest on the stand 1 bars 18 will swing with the arms and rockthe castingicausing bolt 8 to engagethe notch opposite to which it has stopped. Then as the table is lowered the lower ends of spring 6 will be drawn rearll wardly, the extent of such movement depending on the distance between the pivotal point of the bar 18 with casting 3 and the notch engaged by bolt 8.

On the other hand if a man is placed on the foot rest whose weight will force the plate 12 to its lowest position the bolt 8 will travel to the upper end of the slot and engage the last, upper notch. Therefore when the table is swung into horizontal position the springs G will be drawn back to their maximum exunder the pull of the bar 18 so that its upper end will be thrown rearwardly.

tent, due to the fact that the casting rocks It will therefore be clear to those using such tables that the device described will cause the springs 6 to take such position that they will balance whatever weight, within practical limits, may be placed on the foot rest.

I What I claim is i 1. In a device of the kind described, a

longitudinally slotted, pi t d casting ha ing notches n the front edge of the slot, a

tension spring, a bar pivotally connected to a free end of the spring and adapted to work loosely along the slot of the casting and to be brought into engagement, with one of the notches, on rocking movement of the casting, a spring supported foot rest, downward 1 movement of the foot rest rocking the bar on its pivotal point, and means for rocking the casting after the said foot rest has been depressed. i

2. In a device of the kind described, 'a stand, a pivoted table, a notched pivoted casting, a tension spring for said table, a bar engaging said spring and casting and movable alongthe casting, a spring supported foot rest adapted to move the bar along the casting when thefoot rest is depressed, and means connecting the casting to the table thereby rocking said casting on lowering of the table, said bar engaging a notch of the casting when the latter is rocked.

3. In a device of the kind lescribed, a

stand, a table adapted to swing from an upright into a horizontal position, a counter- 4. In a device of the kind described, the

combination with a stand and a pivoted table carried bythe stand, of a slotted and notched casting arranged within thestand,- a counterbalancmg spring for the table, a U-shaped bar, transverse bolts therethrough, one of said bolts engaging the spring and forming a pivot for the bar, and the other working in i the slot of the casting, a spring supported foot rest, means carried thereby engaging the U-shaped bar when the table is inup right position, and for rocking said bar on depression of the foot rest, thereby bringing the bolt into vthe casting slot opposite a notch determined by extent of downward movement of the foot rest, and means connecting the table and casting for bringing said bolt in engagement with said'notch and rocking said casting on lowering of the table to horizontal position.

In testimony whereof I have afilxed my signature.

WILLIAM RICE. 

